Centrifugal fluid-fuel burner



May 10 1927. 1,627,690

F. S. DENISON GENTRIFUGAL FLUID FUEL BURNER Filed March l0, 1924 [/v VEN Ton fREf/v/c/(J DEN/60N Patented Maymlo, 1927."`

, PATENT OFFICE.

rannnnrcxfs. nnNIsoN, or' inNNnx'ro-Lxs, MINNESOTA.

CENTBII'UGAL FLUvID-FUEL BURNER.

Application med umh 1o, 19'24. seriai No. sesgos.

This invention relates to im rovements in though, with minor obvious changes in bear- 55 fluid fuel burnersof the centri ugal type'for the circumferential distribution of iluid fuel such, .for example, as are known in the .oil- 5 burningart. In burners of this'type there are present a multiplicity of'parts moving and stationary, their operative disposition entails a relatively large amount of space which is dis'- advantageous particularly in the case of 1nstallations in previously assembled furnaces, boilers and similar heating'plants, andthe operation of these many parts induces noise and vibration which is especially objectlonable in residential installations.

This novel apparatus. provides a burner of the Hcentrifugal type which is a compact unitary structure, and one in which there are i minimized the usual space requirements, the commonnoise and vibration, and powerconsumption. l Broadly, the invention includes a burner head rotatably mounted to distribute the fluid fuel V'circumferentiallyin combination witha'pump to force the fuel to the headv anda driving means. The head,'pump and driving means are preferably mounted for rotation in axial alinement in a compact u nitary structure.

the centrifugal type. I Other objects o f the invention will more fully appear fromthe following description and the accompanying drawings and vwill be v pointed out in the annexed claims.

' In the drawings there has been disclosed a structure designed to carry. out the objects f 'the invention, but itis to be understood 4 .that the invention is not confined to theexact featuresshown, as' various changes mayk be madelwithin the scope of the claims w ich follow. J i In thedra Fi 1 :is a

vertical sectional view l through the' novel burner;

- "Figure'2 is across-sectional view on the d line 2"-2f of Figure 1;'and .i-gFigure 3 is `a cross-sectional view onthe The'selected embodiment ofthe invention,

"which is here illustrated for purposes of disclosure of theinvention shows/a centrifugal .fluid fuel burner of the 'upright type. ll-

The object therefore of this invention is to provide an improved fluid fuel burner of.

ings, etc. the burner may be used at different angles vto the'horizontal or vertical.

The distributing head consists of .two associated members, a base 6 having its upper surface 7 concave, and `inwardly terminatingin an aperture whereby the base ma be mounted upon the upper end of the sha 8 and a cap 9 havin a convex inner face is mounted upon the ase 6 with its convex face in opposition to the concave face 7 of the base.v The cap 9 may be secured to the base in spaced relation by means of the threaded bolts 11 each having a spacing col' lar 12. The base 6 is preferably secured to the shaft 8 for rotation therewith as.- by -means of the key 13.'

flhe shaftiis adapted to be rotated by a sultable driving means, such as an electric motor. The housing 14 of the electric motor may be supported by means of-a plurality .of legs lsecured to the cover 16 of the casing 17 ofen oil chamber 18. As is d common in this art, the rotor' of the electric motor may be keyed to the shaft 8 and the motor housing provided with the usual endthrust bearings for the rotatable support and actuation ofthe shaft 8. l.

rests upon .a suitable support 19 and is adapted to contain a supply of the fluid fuel The casing of the fuel orvv oil chamber 18 .A

-' such as the oil 21. The o1-l in the chamber 18 mayl bemaintained ata predetermined constant .level byv meansI of a common form of float valve 224 operatively mounted in an auxiliary'recess of the chamber 18. The oil supply is 'received' throngh the pipe 23 4from a suitable source not necessary to be shown, and its entrance. into the oat recess is controlled by the float valve 22. l A pumpingdmeans is positioned within the oill chamber 18 and is adapted yto force' the fluid fuel to the distributing head. The

housin or casing 24 of the pumping neans,

is pre era-bl ,provided by an inte tension of th motor housing 14. Thpump casing is annular in form, as is shownin Figure' 2, and is integrally' connected to the motor 4housing "meniber 25having a flared annular intermediate portion 2,6 land an integralaxially deby means of a sleeve-likev pending annular shoulder 27. The member. 25 and the shoulder27 provide bearing surfaces for the lower; portion of the shaft 8.

upper disk 33 and eifectually ltendency of the fuelto churn i i tion o g 4neaaeeo The shell or' casing` 24 is spacedfrom the floor of the casing 17. Hence oil in the chamber 18 may freely pass within the casing 24 for engagement by the blades or vanes 28 of thel pumping means. The vanes are here shown as four 1n number'and as radially extending from a common hub 29 keyed and fxedly secured to the adjacent end of the shaft. These vanes 28v are also held between two disk members which are rotatably carried by the'hub 29. The lower disk 31 is apertured, as is shown by the quadrantal apertures 32, for the free admission of the fuel into the space between adjacent vanes. This lower' disk .has its circumference in close proximity to the inner face of the casing 24. The upper disk 33 terminates short of the inner face of the casing 24 and the uid fuel which is drawn between the venes, upon 'rotation of the shaft and pumping means, is upwardly forced.

A conduit is provided for communication between the fuel chamber 18 and the distributing head. In this embodiment-of the invention, such communication is afforded bg the conduit 34 axially extendin through t e shaft 8 to the space between t e base 6 and cap 9 of the distributin head. The conduit, ad'acent the lower en of the shaft, extends ra ially in opposite directions and opens into an annular groove 35 in the shaft. The material of the flared intermediate por,-

tions 26 and of the depending shoulder 27 i is drilled or otherwise treated' to, provide the ports 36 leading from the interior of the chamber 18 to the shaft groove 35 which has communication by means of the radial extensions of the axial conduit34. Preferably, a stationary disk 37 is fixed to the stationary shoulder 27 relatively closely to the reventa a Idly within the chamber above the upper revolvin disk 33.

Means are rovided to control or regulate the rate of ceding of the pumped fuel to the head and therefore the rate of fuel dis.- tribution of the head. AA simple means of effecting such regulation is by means of the .needle valve 39 received in threaded engagement through an axial a erture in the cap 9 and adapted to bey hel in a plurality. of selectively adjusted lositions by means of the lock-nut 41. en Lthis Yvalve aproaches its seat, the rate of fuel feeding 1s obviously decreased, andiviceversa.

-This needle valve construction has another function and that is of radially jetting the fuel which is u wardly forced therea ainst by thmmp. he-tap'ered pointed en porthe valveis ada ted to co-operate with, and to extend s ightly within, a tapered bore in the upper end oftheshaft conduit 34 which functionsl as -the fvalve- 1 seat. The construction of this' s/eat and valve! is therefore such that the pumped oil, is initially radially sprayed by the needle Ivalve to the distributing head which, in

turn, by the centrifugal function of its rapid rotation efficiently sprays the fuel by igni- 'I0 v tion.

Through this preferred direct connection of the head, motor and pump there is provided a compact, quiet, eiiicient structure of few moving or stationary parts and one which is economical in power consumption and the dual function of the valve, of regulation and of initial and directional breaking-up of the pumped fuel, is of decided advanta e in the regulation and eilicient wor in o the burner.

aving thus described my invention what I claim as new and desire to secure by Letters-Patent, is:

1. A reservoir as abase, a motor housing upon the top wall of said reservoir having a cylindrical extension. within the reservoir, said extension having a terminal chamber, a motor within the housing havin a shaft journaled in said extension, said s aft hav- 9 in an axial passage, a disk-pum within said chamber supported thereby an by saidv shaft, and adapted to discharge into said axial passa e, and a centrifugal burner lhead upon saids aft above the motor, adapted to 95 receive oil. from said axial passage and distribute the same in sheet form horizontally.

2. .A device of the class described, having l an oil reservoir as a base, a-removable coverl for said reservoir, a -motor housing aboverand immovably secured` to said cover and havin la hollow cylindrical extension passin t rough the cover into the reservoir,

said extension having a downwardly-opening terminal chamber, providing al central depending bearing having passages leading from its u per si e inwardly for. communication wit the extension bore, a pump-disk carried by said bearing, a motor in said housing having a shaft journaled in said ex- 119 tension and having a central bore communi eating with the assages of said bearing a second pump-disk carried by said shaft below the first mentioned disk, and a centrifugal. distributor head upon said shaft, above sald motor, having a horizontal distributing passage communicating with the shaft bore. 3. 'device of the 'class described, comrising a closed oil reservoir, a motor housmg immovablv mounted uponthe top of said. 12 1 reservoir an having a depending hollow bearing extension extending within-; the reservoir, said extension having an enlarged downwardly-opening chamber, providing a central bearing having passages leading inn* wardly and communicatingl with the extenslon bore, a lmotprpin said ousing having a shaft journaled; in sad extension and having a bore communicatinglwith said bearin bore,'a head atthe top ofsaid sha 1 communicating with said shaft bore, and a to dischar circumferentially of the verdisk-'pump carried by the shaft and extentical perip ery of said head, the lowermost sion and disposed within said chamber. portion of said passage being substantially 4. A shaft having an axial bore, a fuel at the level of the upper end ofV said shaft,

5 distributor head having a base element seand a screw threaded throu h said plate and cured to the shaft and having a concave having a needle-valve relation to said axial upper face, a plate removably secured to the bore. base element and having a convex lower face In witness whereof, I have hereunto set spaced from the concave face 'of said base to my hand this 4th day of March, 1924.

10 form an upwardly slanting passage adapted FREDERICK S. DENISON. 

